Snap-fastener



w. w. PENFIELD.

SNAP FASTENER. APPLICATION FILED FEB-25, 1921;

1, 92,23 v PatentedSept. 27, 1921.

. 6 .Y t mmlll l I 33 m;

UNITED STATES PATENT OFFICE.

WILLIAM W. PENFIELD, 0F STAMFORD, CONNECTICUT, ASSIGNOR TO VIILLIAM PENFIELD, INCL. OF STAMFORD, CONNECTICUT.

SNAP-FASTENER.

Application filed February 25, 1921.

To all 40 7mm it may concern Be it known that 1, WILLIAM IV. PEN- FIELD, a citizen of the United States, and a resident at No. 597 Pacific street, in the city of Stamford, county of Fairiield and State of Connecticut, have invented certain new and useful Improvements in Snap-Fasteners, of which the following is a specification, reference being had to the accompanying drawings.

It is the purpose of this invention to avoid an objectionable feature in such articles as now made which results in the speedy defacement and usually the destruction of the cloth or other covering of the buttonor socket member of the fastener and also as a further improvement the more secure engagement between the so called. bird cage member of the fastener and the socket.

In the drawingsFigure 1, represents a perspective view of the exterior shell of the socket. Fig. 2, a similar perspective view of the reinforcing disk or the shell. Fig. 3, a similar perspective view of the interior shell of the socket. Fig. 4, a sectional view of the three members above stated assembled with the cloth or other covering of the button or socket member in place. Fig. 5, an elevation of the member sometimes called the collet which being forced into the interior shell after it has been passed through the fabric to which the fastener is to be attached, clamps all the stated members and the fabric together. Fig. 6, a sectional view of both members of the fastener in usable engagement with each other the fabric being properly clamped to each of them.

In the drawings 1 illustrates the exterior shell of the socket made in the shape shown and preferably of thin sheet metal. 2 is a metallic disk preferably somewhat dished in form as shown to conform to the interior surface of the exterior shell.-3 is the interior shell shaped as shown best in Figs. 3 and 4 that is to say it has the two prejecting flanges 5 and 6 connected by a substantially fiat surface 7 These parts are assembled as shown in Fig. 4:, that is to say the cloth or other covering 8 for the socket is applied to the exterior shell in a manner well known, and the disk 2 is then pressed into the shell preferably clamping the edges of the covering between them; the inner shell is. then introduced and pressed to its place with the edge Specification of Letters Patent. Patented Sept. 27, 1921 Serial No. 447,671.

of the flange 5, resting on the disk 2. The collet shown in Fig. 5 is similar to those now in use except for the important difference that it has an inwardly pressed circumferential groove 9 at its base and is preferably provided with a series of openings 10 which in certain cases contribute to the perfection of the operation of uniting the parts under pressure. The collet is now passed through the fabric 11., see Fig. 6, to which the socket is to be attached and is then introduced within the interior shell and subjected to such degree of pressure as will deform it and usually to some extent press the flange 6 of the interior shell, which partly supports the collet, outwardly, thus properly forming and clamping all the parts of the socket to gether and attaching it as a whole to the fabric.

The bird cage member of the fastener need not be here described because it may be of any preferred construction that shown in Fig. 6 is one of the well known forms.

By my invention I secure a number of advantages among them the following: The interposition of the reinforcing disk 2 between the exterior shell and the collet enables the shell toresist the pressure applied upon the collet which has heretofore. frequently caused the shell to bulge outwardly thus producing a lump beneath the cloth or other covering of. the button of the socket which very soon becomes so worn as to be unsightly and soon thereafter wears through thus destroying the socket. Also the presence of the inwardly projecting groove 9 at the base of the collet affords when the parts are assembled as shown in Fig. 6, the inwardly projecting rib 12, whereby the bird cage member of the fastener is afforded a much more secure engagement with the socket than in any form of fastener known to me.

It will be obvious to those who are familiar with such matter that departures may be made from the special details of construction shown by me which constitute one form only of many in which the essentials of my invention may be embodied, I, therefore, do not limit, myself to such details.

I claim 1. A socket member for a snap fastener having an exterior shell, an integral double flanged interior shell, a continuous and i perforate reinforcing member between them, supported at its edge by the outer flange of the interior shell, and a collet having a solid top and perforated sides supported by the 5 inner flange of the interior shell.

2. A socket member for a snap fastener having an exterior shell, an integral double flanged interior shell, a continuous and imperforate reinforcing member between them, supported at its edge by the outer flange of the interior" shell, and a collet having an annular internally projecting rib at its base and a solid to and perforated sides.

l LLlAM W. PENFIELD. 

